Ash-door.



A. E. PARKER, C. S. DAVY & D. G. MEIKLEREID.

s noon. APPLICATION FILED OCT. 30. IGNI- Patented Apr. 8, 1919.

IMVENTORJ. m m

o f ATTORNEYS.

UNITED STATES PATENT OFFICE.

ALFRED EDWARD PARKER AND CHRISTOPHER SAMUEL DAVY, OF LONDON, AND DUNCAN GRAHAM MEIKLEREID, 0]? LEE, ENGLAND, ASSIGNORS TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ASH-DOOR.

Original application Med August 13, 1918, Serial No. 249,732.

Specification of Letters Patent.

1918. Serial No. 260,289.

To all whom it may concern Be it known that we, ALFRED EDWARD PARKER, CHRISTOPHER SAMUEL DAVY, and Duncan GRAHAM Mmnnsnnm subjects of the King of Great Britain, and residing at 56 Lyncroft Gardens, West Hempstead, London,N. W., 6, England, 162 Rosendale road, Dulwich, London, S. E., 21, England, and 98 Burnt Ash Hill, Lee, county of Kent, England, respectively, have invented certain new and useful Improvements in Ash-Doors,

of which the following is a specification.

Our invention relates to a novel form of ash door, particularly for use with chain rate stokers, and it has for its object an 1m rovement in a device of this character. 8m present application is a division of our rior application Serial No. 249,732, which was filed in the United States Patent Office August 13, 1918.

Our invention will best be understood by reference to the accompanying drawings, in which Figure 1 is a section on the line 11 of Fig. 2, of the rear end of a chain grate stoker showin a dumping bar and the ash door associate therewith; Fig. 2 is a plan of the portion of thestoker and associated parts shown in Fig. 1; Fig. 3 is a vertical longitudinal section, taken along the center line of Fig. 4, of an ash doorembodyin our inventlon and comprising a plurality o inter-engaging sections forming the upper surface thereof; Fig. 4 is a cross-section on the line a-b of Fig. 3; Fig. 5 is a cross-section on the line c-d of Fig. 3; and Fig. 6 is a plan of the central section of the ash door, this section being the final section.

Referring now to the drawings, 1 is a chain grate stoker, the rear end of which is indicated by the reference numeral 12.

At the rear end of the stoker 1 is fitted an admstable ash plate or dumpin bar whereby to vary the resistance to c inker" passin over the ash plate into the ash pit of the stoker and to allow large clinker to be deposited rapidl into the ash pit. As shown in Fig. 1, t e ash plate is in two parts, the main portionll resting on the rear end 12 of the grate and formin an air seal, ample movement being allowe to the nose 13 to follow the movement of the grate. To the portion 11 is hinged on a bar or rod 14 a rearwardly extending flap 14 (indicated in the drawings in various positions) which flap forms a variable resistance to the clinker, as it can be moved into any desired posltion to suit various classes of coal without interference with the continuous operation of the stoker. .The flap 14 can be raised and lowered by any suitable mechanism. One form of such mechanism consists, as shown, of a lifting rod or rods 15 for su porting the flap 14 passing through a guide or guides formed by an openin or openings 16 in the body of the ash p ate and is operated by one or more levers 17150 which the lifting rods 15 are attached, said levers 17 being mounted on a shaft 18 below the bearers 19 and arranged to slide along the shaft 18 to any desire position central with the guide formed in the body of the ash plate. The operating lever or levers 17 can be manipulated either at the rear or throu h the side wall, or from any desired point y means of a converting re 22 which may be connected to suitable operating levers, as shown, from the front of the stoker by means of levers 20, 21, and connecting rods 22. The ash plate and flaps 14, of which any desired number can be used according to the width of the furnace (three being shown) are easily removable as the flap is not required for an air sea, while ample clearance can be arranged between adjacent flaps, as also between the end flap and the outside wall 6, thereby avoiding any chance of the flaps jamming or foulingWhen raised or lowered. The flaps can be perforated to reduce weight and may be arranged to be operated separately or in unison. The flaps 14 can be agitatcdby rapid raising and lowering to assist the passage of clinker into the ash pit if necessary.

The ash door, which constitutes the principal feature of the present application, is

composed of two castings 26, one at each and, united by frame members 27 and a number of sectional members 29, the sectional members except one being preferably formed with offset projections 35 so as to allow them to interla In the form shown in Fig. 1, the sectional members 29, which constitute the surface members for the ash door, are fitted with set-screws 30 and plates 31, by which to secure the same to the frame members 27,

while in the form shown in Figs. 3 to 6 the sectional members are formed wlthinwardly projecting flanges or lips 32. In the latter construction the door is composed of two castinfgs 26, one at each end, united by suitable rame members 27 and a num er of sectional members 29. The top laterally ex tending flange of each member 27 is recessed at one point 27' (see Fig. 6) to receive the lips 32 of the sectional members 29, which are then dropped into place on the frame, the lips passing through the recesses or openings 27, and the sections are then moved right and left to their proper positions. Ihe sectional members 29 are formed withribs 33 to support them on the frame. When the correct number of sectional members 29 has been placed on the frame, a final sectional member 34 in introduced and bolted securely to the frame member by bolts not shown, the member 34 being provided with downwardly extendin ribs 36 which drop betweenand en age t 0 members 27, thus completing the oor and insuring the rigidity of the whole structure.

As, a result of the constructions ofnsh door described,'comlete freedom for expansion is allowed w ereby the castings are prevented from buckling and burning and a construction of great rigidity is produced. Moreover, thelength of the door can be increased or reduced without adding to the number of patterns used, while the renewal .section.

of any section of the door may be efi'ected without renewal of the whole door.

What Iclaim and desire to secure by Letters Patent of the United. States is 1. An ash door comprising a plurality of independent surface members whose surfaces form the operative surface of the door, said surface members being each independently supported so aS to be movable toward and away from each other, the members being provided with projections constructed and arranged to maintain with-adjacent sections a substantially continuous operative surface to the door as the surface members are moved apart by changes in temperature.

2. An ash door comprising a frame, a plurality of inter-engagln sectional members each independently an slidably .supported on said frame so as to movement on said frame, the surfaces of said members formingthe upper surface of the ash door, and each of said sections except one being provided with an oifset projection adapted to in'terlap with the adjacent 3. "An ash door comprising a frame provided with a--laterally extending flange, a plurality of interengagin "sections supported on said frame an independently and longitudinally movable thereon, each section being rovided with a member extending latera ly beneath said flange to hold the section on the frame.

4. An ash door comprising a frame, a lurality of inter-enga ng sectional mem ers supported on said tame and forming the upper surface of the ash -door, each of said sections except one be provided with an ofi'set rejection adap afl to interlap with the adiacent Section, each section being formed with a. laterally extending lip arranged to engage theframe and secure the section in position. v

5. An ash door comprising a frameprovided with a laterally extending flange repermit longitudinal iate point, a plurality longitudinally of the door, said sections also being formed with offset projections adapted to interlap with adjacent sections.

An ash door comprising a frame provided with a laterally extending flange recessed at an intermediate point, a plurality of sections forming the operative surface of the door, each of said sections exceptone being provided with a lateraly extended lip arranged to pass through said recess and engage said flange when the section is moved longitudinally of the door, said sections also being formed with offset projections adapted to interlap with an adjacent section, the last section being arranged to interlap with the offset projections of the adjacent sections and secure the other sections in position.

In testimony whereof we have hereunto signed our names in the presence of the subscribing witnesses.

ALFRED EDWARD PARKER. CHRISTOPHER SAMUEL DAVY. DUNCAN GRAHAM MEIKLEREID.

Witnesses to the signature of Alfred Edward Parker:

W. LONEY, J. J. BRAMWELL. Witnesses to the signature of Uhristopher Samuel Davy:

J N0. E. STARFORD, H. P. SMITH. Witnesses to the signature of Duncan Graham Meiklereid:

W. E. WHITEMAN H. P. SMITH. 

